The main causes of abdominal pain when angry include the following: 1, irritable bowel syndrome: is a common dysfunction, in the process of anger, can induce irritable bowel syndrome, will lead to small abdominal pain and abnormal defecation and other symptoms; 2, diaphragm spasm: if in the process of anger there is extreme breathing and increased oxygen consumption, resulting in excessive movement of the diaphragm, causing abdominal muscle spasm, will also cause small abdominal pain; 3, Recurrence of hernia: If there is a hernia itself and the muscle connection is weak, which triggers a hernia attack when intestinal distension or intra-abdominal pressure rises, it can also cause small abdominal pain. Therefore, you should usually try to relax and try not to get angry.